A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Utilizing lithium slag to improve the physical-chemical properties of alkali-activated metakaolin-slag pastes: Cost and energy analysis
https://orcid.org/0000-0001-9305-8655
Graphical abstract Display Omitted
Highlights The substitution of LS leads to a decrease in the yield stress of AAM. The setting time of the sample is greatly shortened by incorporation of LS. When LRMR ≤50 %, AAM can obtain significant strength improvement. LS can increase the content of C-(A)-S-H gel in AAM and refine the pore structure. The utilization of LS in AAM significantly reduces the cost index and energy index.
Abstract The utilization of lithium slag (LS) poses an imminent challenge in the solid waste disposal industry. In this work, ternary alkali-activated materials (AAM) were synthesized for the first time using a combination of LS, metakaolin (MK) and granulated blast furnace slag. The roles of LS replacing MK ratio (LRMR) on rheology, initial fluidity, setting time, compressive strength, heat release, phase composition, microstructure, cost and energy consumption were investigated. The results show that the substitution of LS leads to a reduction in the yield stress of the paste and an increase in its initial fluidity, which can be attributed to the comparatively lower specific surface area of LS compared to MK. Additionally, incorporating LS deepens the early reaction degree of the paste, so the setting time is shortened. Moreover, the incorporation of LS improves the compressive strength of the samples by promoting increased calcium (aluminate) silicate hydrate gel formation and refining pore structure. In terms of cost and energy consumption, the samples with LRMR of 25 % and 50 % exhibit a cost index that is respectively 37.2 % and 48.7 % lower than that of the control sample without LS, resulting in corresponding decreases in energy indexes by 24.1 % and 21.4 %. The findings may shed valuable light for the rational utilization of natural mineral resource (MK) and industrial by-product (LS).
Utilizing lithium slag to improve the physical-chemical properties of alkali-activated metakaolin-slag pastes: Cost and energy analysis
https://orcid.org/0000-0001-9305-8655
Graphical abstract Display Omitted
Highlights The substitution of LS leads to a decrease in the yield stress of AAM. The setting time of the sample is greatly shortened by incorporation of LS. When LRMR ≤50 %, AAM can obtain significant strength improvement. LS can increase the content of C-(A)-S-H gel in AAM and refine the pore structure. The utilization of LS in AAM significantly reduces the cost index and energy index.
Abstract The utilization of lithium slag (LS) poses an imminent challenge in the solid waste disposal industry. In this work, ternary alkali-activated materials (AAM) were synthesized for the first time using a combination of LS, metakaolin (MK) and granulated blast furnace slag. The roles of LS replacing MK ratio (LRMR) on rheology, initial fluidity, setting time, compressive strength, heat release, phase composition, microstructure, cost and energy consumption were investigated. The results show that the substitution of LS leads to a reduction in the yield stress of the paste and an increase in its initial fluidity, which can be attributed to the comparatively lower specific surface area of LS compared to MK. Additionally, incorporating LS deepens the early reaction degree of the paste, so the setting time is shortened. Moreover, the incorporation of LS improves the compressive strength of the samples by promoting increased calcium (aluminate) silicate hydrate gel formation and refining pore structure. In terms of cost and energy consumption, the samples with LRMR of 25 % and 50 % exhibit a cost index that is respectively 37.2 % and 48.7 % lower than that of the control sample without LS, resulting in corresponding decreases in energy indexes by 24.1 % and 21.4 %. The findings may shed valuable light for the rational utilization of natural mineral resource (MK) and industrial by-product (LS).
Utilizing lithium slag to improve the physical-chemical properties of alkali-activated metakaolin-slag pastes: Cost and energy analysis
https://orcid.org/0000-0001-9305-8655
Graphical abstract Display Omitted
Highlights The substitution of LS leads to a decrease in the yield stress of AAM. The setting time of the sample is greatly shortened by incorporation of LS. When LRMR ≤50 %, AAM can obtain significant strength improvement. LS can increase the content of C-(A)-S-H gel in AAM and refine the pore structure. The utilization of LS in AAM significantly reduces the cost index and energy index.
Abstract The utilization of lithium slag (LS) poses an imminent challenge in the solid waste disposal industry. In this work, ternary alkali-activated materials (AAM) were synthesized for the first time using a combination of LS, metakaolin (MK) and granulated blast furnace slag. The roles of LS replacing MK ratio (LRMR) on rheology, initial fluidity, setting time, compressive strength, heat release, phase composition, microstructure, cost and energy consumption were investigated. The results show that the substitution of LS leads to a reduction in the yield stress of the paste and an increase in its initial fluidity, which can be attributed to the comparatively lower specific surface area of LS compared to MK. Additionally, incorporating LS deepens the early reaction degree of the paste, so the setting time is shortened. Moreover, the incorporation of LS improves the compressive strength of the samples by promoting increased calcium (aluminate) silicate hydrate gel formation and refining pore structure. In terms of cost and energy consumption, the samples with LRMR of 25 % and 50 % exhibit a cost index that is respectively 37.2 % and 48.7 % lower than that of the control sample without LS, resulting in corresponding decreases in energy indexes by 24.1 % and 21.4 %. The findings may shed valuable light for the rational utilization of natural mineral resource (MK) and industrial by-product (LS).
Utilizing lithium slag to improve the physical-chemical properties of alkali-activated metakaolin-slag pastes: Cost and energy analysis
Guo, Chuanchuan (author) / Wang, Ru (author)
2023-08-27
Article (Journal)
Electronic Resource
English
Lithium slag , Metakaolin , Geopolymers , Rheology , Cost and energy analysis , AAM , alkali-activated materials , LS , lithium slag , MK , metakaolin , GBFS , granulated blast furnace slag , AA , alkali-activated , LRMR , LS replacing MK ratio , C-(A)-S-H , calcium (aluminate) silicate hydrate gel , N-A-S-H , sodium aluminate silicate hydrate gel , SSA , specific surface area , XRD , X-ray diffraction , TG , thermogravimetry , FTIR , Fourier transform infrared spectroscopy , MIP , mercury intrusion porosimetry , BSE , back scattered electron imaging
Alkali-activated slag-metakaolin pastes: strength, structural, and microstructural characterization
| Taylor & Francis Verlag | 2013